diff --git a/source b/source
index 9b1ed36da88..55eb7d91566 100644
--- a/source
+++ b/source
@@ -59648,6 +59648,10 @@ dictionary <dfn dictionary>AssignedNodesOptions</dfn> {
   data-x="dom-slot-assign"><code>assign(...<var>nodes</var>)</code></dfn> method steps are:</p>
 
   <ol>
+   <li><p><span data-x="list iterate">For each</span> <var>node</var> of <span>this</span>'s
+   <span>manually assigned nodes</span>, set <var>node</var>'s <span>manual slot assignment</span>
+   to null.</p></li>
+
    <li><p>Let <var>nodesSet</var> be a new <span data-x="set">ordered set</span>.</p></li>
 
    <li>